Insulator



L. STEINBERGl-IR.

INSULATOR.

N FILED APR APPLICAT .29,1918. 1,426,516. 7 Patented Aug. 22., 1922.

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WITNESS -54 5J1 INVENTOR v m/W2) J M A, ATTORMEY L. STEINBERGER.

INSULATOR.

APPLLCATION man APR. 29, 1918.

Patented Aug. 22, 1922.

2 SHEETSSHEET 2.

f j INVENTOR BY I (2M 44.. ATTORN WITNESS UNITED STATES PATENT OFFICE. a

LOUIS STEINBERGER, OF BROOKLYN, NEW YORK;

. INSULATOR.

T 0 all whom it may concern 1 Be it known that I, LOUIS STEINBERGER,

a citizen of the Unitedbtates, and a resident of the borough of Brooklyn, county of Kings, city and State of New 'York, have invented certain new and useful Improvements in Insulators, of which the following is a specification. v

My invention relates to an insulatorconstruction having particular reference to the type and formation of the strain members embedded within the insulator body.

One of the objects of my'invention is to provide an insulator with strain members of such construction as to lessen the lines of stress and strain within the body oflthe insulator and thereby to-less'en the concentration ofheat in the central portion of. the

inwhich the strain members Referring to the drawings, Fig; 1 is a view' partly insection and partly in side elevation of an insulator embodying my invention.

Fig. 2 is a plan in detail of an assembly of strain members embodying my invention in the positions in which they are placed in the body of the insulator when molded therein. j v

Fig. 3 is a perspective side view of an assemblage of strain members embodying my invention showingtheir position in the body of the insulator.

Fig. 1 is a plan view of an assembly of strain members showing. a modified form of my invention. 7 1

Fig. 5 is a view partly inside elevation and partly in section illustrating the strain members as shown in Fig. 1.

The insulatingmaterial forming the body of my insulator may be of any suitable kind,

but I prefer to use the'insulating material knownin the art as electrose and the remaining parts are formed of any suitable metal or alloys thereof.

. Specification of Letters Patent. Patented Aug, Application filed April 2 9, 1918. Serial No. 231,336.

Referringto the drawings, 10 is a body of insulating material which may be of any preferred shape but I have chosen to illustrate abody having a contour as shown in Fig. 1 wherein the side of the insulating body has projecting radially therefrom central'fiange 11 of greater diameter'than the two radially projecting flames l2 and 13 at either end. I i

14: is an integral strain member, a portion of which is embedded in the insulator body and 15 is the embeddedportion of a two part strain member hayinglegs 16 and 17 projecting from the side of the body of the insulator. 1 8; is the complementary portion of'the two part strain member which is secured to theprojecting ends 16 and 17 of the embeddedportions by means of nuts 19 and 20 engaging screw threads 21 and 21'. and 22 and 22 on the respective ends of the portions 15 and 18 of the strain mom'- ber, as well known in thisart, i

The strain membersare provided with bridge portions or members- 30 and 31 which consist of rings 82 and 33, each of which is substantially circular in cross section and integrally secured to the embedded legportions or members 34 and 35, 36 and 37 of the respective strain members by means of offset arms 38, 39, {10 and 4:1 as shown. The

strain members are interlocked one with the other so that in case the insulating inatcrial should be destroyed the line will not fall to theground, and they are so situated with respect to eachother that the respective rings of the bridge portions of the strain. members will be oppositely disposed to, each. other in the central body ofinsulating material. 1

The ring portions ofthe strain members act as electrostatic stressdistributers, and at thesame time act as uniform mechanical strain distributers. Because of the open or skeleton construction due to the oppositely disposed ring portions, the formation 'of heat in the central portion of the insulating body isprevented. Aswill be seen from the drawings, the legs of the strain members are disposed near to the outer side surface of the body of the insulator so that the generated. heat may be carried off quickly from the inner portion of the body of the insulator to prevent the deleterious effects due to the formation, of the heat and portion of the of the insulator.

The amount of offset or length of ofiset between the leg portions and the ring portions of the strain member is determined by the voltages to be used or applied to the insulator. As will be readily understood, the greater the space between the ring and leg member of the strain member the greater will be the insulation value of the insulator.

Projecting from each of the legs of the strain members which are embedded. in the body of the insulating material are metallic arms 50, 51, 52, 53, 54, 55, 56, 57, which are curved so as to lie in lines which are concentric respectively with. the ring portion of the strain members. These arms are also so situated on the legs of the strain members that when the strain members are sembled for molding in the insulator body each pair is respectively placed direc opposite the ring portion of the other strain member and in the same horizontal plane therewith. The distances between each arm and adjacent ring portion indicated by the line g in Fig. 2 must be less than the di stances indicated by the lines a: in Fig. 2 so there will be more insulation between the points a and 6 than between the points 0 and (Z, and thereby the electrical strains and stresses will be distributed between the arms and 51 and the ring portion of the strain member opposite thereto, and the voltage will not cause rupture of the insulating body which would otherwise be the case should the distance as be less than the distance y. The same desription applies to the relations and distances between the other arms of the assembled strain members, and therefore it is not necessary to repeat the description, as the description for one serves as a description for all.

In Figs. 4 and 5 I have shown another con struction by means of which the electrical stresses and strains are also distributed. In this construction I provide integral projecting fingers 60, 61, 62 and 63, projecting respectively from the ring portions 33 and 82' of the strain members at points diametrically opposite to each other, one p air of fingers projecting ujjiwardly and the other pair of fingers projecting downwardly and in parallelism with the legs of the adjacent strain members. It is therefore seen from this construction that the electrical stresses and strains will be distributed bet-ween the fingers or arms (which project from the ring portions of the strain members) and the legs of the adjacent strain members.

The projecting arms or fingers shown in each of the Figures of the drawings serve to distribute the electrical strains and stresses in the center of the insulating body with a result that the danger of rupture due to the concentration of heat is very much lessened.

The relative position and the relation of the respective parts of the several types are similar to each other and the parts should be adjusted so that the projecting fingers (3U, 61 and 62 and 63 are parallel to the supporting legs of the strain members.

As changes of construction could. be made within the scope of my invention, it is intended that all matter contained in the above description or shown in the accompanying drawings shall be interpreted as illustrative and not in a limiting sense.

Having now described my invention what I claim as new and desire to secure by Letters Patent is:

1. In a device of the kind described, an insulating body, interlocked strain members embedded therein, said strain members enibodying stress distributing rings oppositely disposed to each other, and additional stress distributing members extending from one strain member in the same plane as the stress distributing ring of the other stra in member to co-operate therewith.

2. In a device of the kind described, an insulating body, interlocked. strain members embedded therein, each strain member con sisting of leg portions and a bridge portion said bridge portions being oppositely disposed to each other, stress distributing fingers or'arms projecting from the one portion of one strain member and extending in lines parallel to the lines of the other portion of the other strain member.

In a device of the kind described, an insulating member, strain members embedded therein, said strain members each having leg portions and a bridge element therebetween embodying a ring shaped portion, the leg portions being offset from said riiw shaped portion, each of the leg portions being provided with oppositely projecting arms in substantially the same horizontal plane with the ring portion of the adjacent strain member and extending in a curved line concentric with the ring portion, the distance between the extending arms and the ring portion being less than the distance between the ends of the extending arms and leg portions the adjacent strain member.

4i. In a device of the kind described, a body of insulating material, interlocked strain members embedded therein, each strain member consisting of leg portions extending outside of the body of insulating material and a ring shaped bridge por tion connected to the said leg portions and wholly embedded within the center of the insulating body, projections from the leg portions of one strain member extending in lines parallel to the rings of the bridge portions of the other strain member.

5. In a device of the kind described, a body of insulating material, interlocked. strain members embedded therein, each. strain member consisting of? leg portions extending outside the body of insulating material and a ring shaped bridge portion connected to the said leg portions and Wholly embedded Within the center of the insulating body, said ring shaped bridge portions situated opposite to eachother, projections from the leg portions of one strain member extending in lines parallel tothe line of the ring shaped bridge portion of the other strain member, the lines of the respective, projections and rings lying in the same plane with each other. y

6. In a device of the kind described, an insulating body, interlocked strain members embedded therein, each strain member con-v sisting of leg portions extending outside the insulating body, and a ring shaped bridge portion connected to the said legjpo-rtions' wholly embedded Within the center of the insulating body, projections from the respective legportions extending in lines parallel to the lines of the ring'shaped bridge portions and lying respectively in substantially the same planes therewith, the insulating distance between the end of a projection and the leg portion of an adjacentstrain member being greater than the insulating distance between the projection and the bridge portion of an adjacent strain member.

7. In a device of the kind described, a

strain member, said strain member consisting of legportions connected by a bridge portion, said bridge embodying a ring, and j stress distributing projections extending from'one portion in lines which are parallel to thelines of the other portion.

8. In a device of the kind described, a strain member, said strain member consisting of leg portions connected by a bridge,

said bridgeembodying a ring, and curved projections extending from a leg portion, the of said projections being parallel to April,'l918, a r v LOUIS STEINBERGER. In presence of:

ISABEL R. RICHARDS,- ZITA M. GRAHAM, 

